James burgess



(No Model.)

J. BURGESS.

COLD IRON SHEARS,

No. 595,028. Patented De0.7,1897.

UNrTnn STATES PATENT OFFICE;

JAMES BURGESS, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THOMAS I'IIGI'IAM,JOSEPH IV. JACKSON, ANI) FRANK IV. BALLENGER, OF

SAME PLACE.

COLD-BRON SHEARS.

SPECIFICATION forming part of Letters Patent No. 595,028, dated December7, 189'?. Application filed May ll, 1897. Serial No. 636,122. (Nomodel.)

,To @ZZ whom, t may concern:

Be it known that I, JAMES BURGESS, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented certain new and useful Improvements in Cold-Iron Shears;and I do declare the followin gto be a full, clear, and eX- actdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

My invention relates to an improvement in shears for cutting cold ironand other materials of that class, in which one of the blades isstationary and the other one is moved upward by means of rollerstraveling an incline actuated by means of the operating-lever.

The obj ect of my invention is to provide a device for cutting metalswhich produces a compound or triple power upon the cuttingblades withoutmuch exertion on the part of the operator.

A further object of my invention is to provide an effective, durable,simple, and cheap shears for general workshop use of few parts andcomparatively inexpensive to manufacture.

With these objects in view my invention still further consists incertain novel details of construction and arrangement of parts to behereinafter described more fully and pointed out in the claims.

It will be obvious to a skilled mechanic that shears of this typeconstructed as shown will he more effective and require less exertion onthe part of the operator than those now in common use.

Referring to the drawings which illustratel object of this is to imparta quick motion to the outer end of the pivoted cutting-arm J, having theroller K, and at the same time increasing the shearing power as therollers advance. The arm J is pivoted at L and has the cuttingblade Rattached to its inner edge at the top.

I is the traveling block, having the incline surface II on its top edge,on which the roller K travels. F and G are friction-rollers journaled toits under side.

P is a rack having the teeth p on its top side and is pivotallyconnected to the incline block I at O.

T is a friction-roller on which the rack travels.

IWI is the operating-lever, pivoted to the frame at n and having on itslower end the teeth r, engaging with the teeth on the rack I).

N is a lever pivotally connected to the 0perating-lever at h and to thecutting-arm at on. Said connecting-lever is designed to pull the pivotedarm to the open or normal position when the operating-arm is vertical orat rest when the machine is not in use.

S is a plate to cover and to guide the mechanism and is held in place bymeans of the pivot-bolts fn, t, and L. Said plate is removed in Fig. lto clearly illustrate the interior parts, but its outlines are indicatedin the dotted lines.

In the operation the met-al to be sheared is placed between the knives,and the operating-lever M is pulled downward, which advarices the blockI up the inclines D and E, which forces the pivoted arm J, carrying theknife-blade R, upward, thus cutting the material.

It is further obvious to a skilled mechanic that many minor changes inthe details of construction may be made and substituted for those shownwithout departing from the scope and spirit of my invention.

I-Iaving thus described my inventiomwhat I claim, and desire to secureby Letters Patent of the United States, is-

l. In shears for cutting metals consisting of a frame provided with abase, said frame having a table anda stationary blade rigidly securedthereto, two incline planes placed tandem with the incline on the outerplane IOO greater than the inner plane, said planes preferably integralwith said frame, an arm pivoted to said frame at one end and theopposite end provided with a friction-roller, a cutting-blade secured tosaid arm, a slidable block having friction-rollers on its lower endtraveling in said incline planes of the frame, the top of said blockhaving an incline tapering upward toward its center on which said rollerK travels, a friction-roller on said frame, a rack having teeth slidableon said roller and pivotally connected to said incline block, anoperating-lever pivoted to said frame and having teeth on its lower endengaging with the teeth in said rack to advance said rack when saidlever is pulled downward thereby raising said pivoted arm to close saidknives, a lever connecting said lever and arm to pull said arm downwardwhen said lever is in a vertical position, and a plate on one side tocover said mechanism substantially as shown and described.

2. The herein-described shears for cutting iron and other metals,consisting of a main frame or support having a base and two inolineplanes placed tandem with the outer in* eline at a greater angle thanthe inner one, a blockhaving friction-rollers traveling on saidinclines, said block having an incline on its top, an arm pivoted tosaid frame at one end and a roller at its opposite or outward endtraveling on said incline, said arm having a cutting-blade, a roller journaled to said frame, a rack slidable on said roller and pivoted tosaid incline block, an operating-lever pivoted to said frame and havingteeth on its lower end engaging with said rack, a lever connecting saidlever to said arm to pull said arm to open position and a plate on oneside to cover said mechanism substantially as shown.

3. The combination of the frame A, having the base B table C andcutting-blade a, the inclines D and E preferably made integral with saidframe, the block I having the ineline I-I on its top edge, and rollers Fand Gr traveling on the inclines D and E respectively, the arm J pivotedto said frame at L and having the cutting-blade R, and roller Ktraveling on said incline II, the roller T journaled to said frame, therack I pivoted to said block I at O, and slidable on said roller, theoperating-lever M pivoted to the frame at 'n and having the teeth r onits lower end and engaging with the teeth p of the rack I), to advancesaid rack and press said pivoted arm upward, the connecting-lever Npivoted to said operating-lever at h and to said arm at fm to pull saidarm downward when said lever is in a vertical position and the plate Ssecured to the side of said frame by means of suitable boltssubstantially as shown and described.

In testimony whereof I afix my signature in presence of two witnesses.

JAMES BURGESS. Witnesses:

J No. S. THURMAN, THOMAS HIGHAM.

